Sumitomo Osaka Cement Ako Cement Plant — Japan

Sumitomo Osaka Cement Ako Cement Plant is a cement plant in Japan. Its listed capacity is 4,000,000 t of cement. Cement plants heat limestone to 1,400°C in rotary kilns — one of the hottest industrial processes — and must control temperature precisely across the entire kiln length. It is operated by Sumitomo Osaka Cement Co Ltd. By capacity it ranks #4 among 22 cement plants in Japan. It emits about 1,273,046 t CO₂e a year from Climate TRACE. That is 0.78% of the CO₂e from the 105 facilities in Japan that have an emissions figure in IndustryAtlas. Its CO₂ per unit of capacity is 12% below the national median for this sector.

Facility data: Climate TRACE v6 (asset-level capacity & CO₂e, CC BY 4.0), id ct-32438804.

In context: how this facility compares

At 4,000,000 t of cement, Sumitomo Osaka Cement Ako Cement Plant is well above the median cement plant in Japan (1,900,000 t of cement). Subsector: cement. As cement plant, it requires high process heat (typically 800–1400°C) for its core industrial operations, supplied by boilers, furnaces or direct combustion. Cement plants heat limestone to 1,400°C in rotary kilns — one of the hottest industrial processes — and must control temperature precisely across the entire kiln length.

Capacity & CO₂-intensity comparison computed from Climate TRACE industrial facilities data; sector role based on engineering reference.

What 1,273,046 t CO₂e a year looks like

This facility's estimated annual CO₂e (Climate TRACE, modelled) in everyday equivalents from the US EPA Greenhouse Gas Equivalencies calculator:

Equivalencies: US EPA Greenhouse Gas Equivalencies. Emissions: Climate TRACE.

Capacity vs largest cement plants in Japan

Listed capacity (t of cement), Climate TRACE v6 (asset-level capacity & CO₂e, CC BY 4.0).

Operator

Operated by Sumitomo Osaka Cement Co Ltd. All facilities by this operator →

Local climate

Sumitomo Osaka Cement Ako Cement Plant sits in a humid subtropical climate zone (Köppen Cfa), at 34.8°N in the northern hemisphere.

Köppen zone: Köppen-Geiger world climate classification (Kottek et al. 2006, 0.5° grid).

Site climate & environmental severity

This site sits in a moderately corrosive environment (estimated ISO 9223 class C3 — Medium), with humidity / wetness the leading environmental stress.

In this site’s local climate, a bare 150 °C surface sheds about 1355 W/m² to ambient — roughly 1.04× the loss at a 20 °C reference. Reference-surface calculation at a 150 °C surface from WorldClim climate normals (ASTM C680 / ISO 12241) — an indicative per-climate comparison, not a measurement of this site’s specific equipment. Open method dataset: DOI 10.5281/zenodo.20787408 (CC BY 4.0).

Indicative estimate via the ISO 9223:2012 informative method (atmospheric corrosivity from temperature, time-of-wetness and airborne salinity), using WorldClim climate normals, the Köppen-Geiger class and coast distance. Indicative, not a measured corrosion rate.

How it compares & nearby sites

The #4 largest of 22 cement plants in Japan by listed capacity (Climate TRACE).

Nearby industrial sites

• Yamato Steel Himeji Plant · Steel Plant · 40,483 t CO₂
• Nippon Setouchi Works (Hirohata Area) steel plant · Steel Plant · 3,541,361 t CO₂
• JFE Bars & Shapes Himeji Works steel plant · Steel Plant · 52,049 t CO₂
• Godo Steel Himeji Works · Steel Plant
• Nippon Sanyo Special Steel · Steel Plant · 92,301 t CO₂
• Kobe Kakogawa Works steel plant · Steel Plant · 7,135,332 t CO₂

Location

Coordinates 34.75128, 134.36486. View on OpenStreetMap.

Frequently asked questions